Acer saccharum is very similar to Acer nigrum
( Black Maple), and the two are sometimes considered to be varieties
of the same species. See the description of Acer
nigrum for distinguishing characteristics. Leaves of Acer
saccharum are also roughly similar to Acer platanoides (Norway
maple). The two species can be easily distinguished by their buds
and fruits (samaras) and
by the color of the sap (clear for Acer saccharum, milky for
Acer platanoides.

Acer saccharum is a major forest tree in Wisconsin and is often
the dominant in upland forests with moderate moisture (mesic forests).
Seedlings and saplings can tolerate relatively dark shade for many years
and may be numerous in the understory of mesic forests. Individual trees
may live 300-400 years if they reach the canopy layer. Flowering begins
in late April or early May in the Green Bay area. It is well known as
the source of sap to make maple syrup.

The range of Acer saccharum extends from Ontario and eastern
Minnesota and Iowa to Missouri, east to Tennesee and Virginia and then
north through New England and the maritime provinces of Canada. It is
found throughout Wisconsin.